Automatic calling device



Oct. 7, 1924. I 1,511,089

, c. E. MALLORY AUTOMATIC CALLING DEVICE Filed Jan. 21 1921 2 Sheets-Sheet 1 Jmntoc Ci I M4110? Oct. 7 1924.

- c. E. MALLORY AUTOMATIC CALLING DEVICE Filed Jan. 21 1921 2 Sheets-Sheet. I;

gwuento'a 6. .E. Mallory,

Patented Oct. 7, 1924.

UNITED STATES CHARLES E. MALLORY, OF WAUPUN, WISCONSIN.

AUTOMATIC CALLING DEVICE.

Application filed January 21, 1921.

To all whom it may concern:

Be it known that I, CHARLES E. MALLonY, a citizen of the United States, residing at VVaupun, in the county of Dodge and State of lVisconsin, have invented certain new and useful Improvements in Automatic Calling Devices; and I do hereby declare the following to be a full, clear, and act de scription of the invention, such as will enable others skilled in the art to which it appertains to make and use-the same.

This invention relates to new and useful improvements in automatic calling or signaling devices and more particularly to a circuit closer and has for its primary object the provision of means whereby a series of signals in the form of horns, gongs or bells may be electrically actuated to convey different signals or calls and whereby any one of the calls or signals may be repeated any number of times desired.

Another object of this invention is the provision of an automatic calling device of the above stated character which will be simple, durable, and eflicient, and which may be manufactured and sold at a comparatively low cost.

WVith these and other objects in view as will become more apparent as the description proceeds, the invention consists in certain novel features of construction, combination, and arrangement of parts as will be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a front elevation illustrating an automatic calling device constructed in accordance with my invention,

Figure .2 is a vertical sectional view illustrating the same,

Figure 3 is a transverse sectional view illustrating the arrangement of the contacts,

Figure 4 is a fragmentary longitudinal sectional view illustrating the means whereby the different calls or signals may be made.

Figure 5 is a top plan View, illustrating the controlling lever.

Referring in detail to the drawings, the numeral 1 indicates a cabinet adapted to contain a circuit closer for the purpose of completing an electric circuit to various signals (not shown) and which may be in the form of bells gongs or horns. The front Wall Serial No. 438,945.

3 of the cabinet 1 adjacent its lower edge is provided with a slot 4 for the purpose of permitting a controlling lever 5 to extend exteriorly of the cabinet. A metallic strip 8 is secured to the cabinet and closes a portion of said slot and is provided along one edge with a plurality of notches 6 and in its front face with sockets 9 that aline with the notches. The notches are adapted to re ceive the lug 7 on the controlling lever for preventing the same from moving longitudinally of the cabinet accidentally while the sockets 9 are adapted to receive a spring pressed catch 10 on the handle 11 of the controlling lever 5 for supporting the outer end of said controlling lever in an elevated position. The inner end of the controlling lever 5 is slidably and rotatably mounted on a longitudinally extending shaft 12 located adjacent the rear wall of the cabinet and just above the bottom wall of the latter. The normal position of the controlling lever 5 is inclined downwardly towards the free end so that the lug 7 is out of engagement with any one of the notches 6 consequently permitting of the lever to be adjusted longitudinally of the cabinet upon the shaft 12. A pair of contacts 13 are carried by the mounted end of the lever 5 and when said lever is in an operative position are adapted to bridge contacts 14 for the purpose of completing an electric circuit to an electric motor 15 within the cabinet. When the lever 5 is in its inoperative position, the contacts 13 are disengaged from the contacts 1 1. The armature shaft of the motor 15 is equipped with a worm 17 adapted to mesh with a worm wheel 18 and the latter is rotatably mounted in the cabinet by a shaft 19. The shaft 19 is provided with a pulley 20 over which is trained an endless belt 21 and the latter passes about a drum 22- with in the groove 23 thereof. The groove 23 is located at one end of the drum 22 and the latter is mounted on a shaft 24a The shaft 24 is journaled in the side walls of the cabinet. The drum 22 has formed on its periphery a series of cams 25 that vary in len th and are provided with irregular active faces and the active face of one cam varies from the active face of the other cam.

Spaced contacts 26 are carried by the lever 5 and are connected to the electric circuit to which the signals are connected and a spring arm 27 is secured to the lever 5 and overlies the c n a 26 an e g ges the per phe y lOU of the drum 22 and consequently rides over the cams during the rotation of said drum and is adapted to follow the exact curvature of said cams. A projection 28 is formed on the free end of the arm 27 and disposed adjacent one of the contacts 26 and on the arm 27 engaging the high portions of the cam, the projection 28 engages the last named contact and forces the same into engagement with its companion contact thereby completing an electric circuit to the signal. During the rotation of the drum an inter mittent closing of the circuit to the signal will be caused by the arm 27 following the curvature of the cam. As the cams vary in formation they will cause various signals or calls to be made when the arm 27 engages the respective cams. The cams on the drum are arranged in alinement wtih the notches 6 as well as the depressions or sockets 9 in the strip 8 so that when it is desired to cause a certain call or signal, the lever 5 is moved longitudinally of the cabinet until the lug '7 underlies the notch in alinement with the desired cam and the handle ll is swung upwardly permitting the catch 10 to enter one of the sockets 9 and lock the lever 5 in an operative position. The lever in the last named position causes the contacts 13 to bridge the contacts 14: completing the electric circuit to the motor 15. The motor 15 in turn drives the drum. lVith the lever 5 so positioned the arm 27 is in alinoinent with the desired cam and when engaged by said cam will bring about an intermittent closing of the contacts 26.

An electric lamp 2 is located within the cabinet in rear of a sight opening 28 and is adapted to be placed in circuit with the other signals so that said electric lamp will convey to the operator the call or signal being made by the device.

As long as the lever 5 is in an operative position, the circuit to the motor 15 remains closed, consequently a continuous rotation of the drum 22 is had which repeats the respective signal or call until the operator moves the love 5 into an inoperative position.

A suitable frame is secured to the front walls of the cabinet 1 for the purpose of supporting a name card. The card is adapted to have a series of names printed or 0th wise applied thereto and arranged in direct alinement with the sockets 9 thereby providing means whereby the operator may readily determine the exact position to move the controlling lever into in order to give a certain signal.

lVhile I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction, combination and arrangement of parts may be made without departing from the spirit and scope of the invention as claimed.

Having thus described my invention what I claim is 1. A mechanism of the class described including a fulcrumed and slidable lever, circuit means controlled through actuation of the lever, a cabinet mounting the lever, a strip on said cabinet having notches in its lower edge, a lug on said lever to enter said notches, said lug being normally disposed below the strip to permit sliding movement of the lever, and a catch on the lever to automatically engage and disengage said strip to maintain the lug in operative position.

2. A mechanism of the class described including a tulcrumed and slidable lever, circuit means controlled through actuation of the lever, securing means for the lever, said securing means having a plurality of notches, a lug on said lever to enter said notches, said lug being normally disposed out of engagement with the notches to permit sliding movement of the lever, and means on the lever cooperating with said securing means to automatically engage and disengage to maintain the lug in operative position.

In a calling device, a drum having a plurality of cams on its surface of varying conformation, an electric motor for driving the drum, contact strips in circuit with said motor and extending the length of the cam surface of the drum, a control. lever slidably and pivotally mounted in. relation to the drum and the contact strips, a bridgin member on said lever COOP'Cl'tltlng with said contact strips to close the motor circuit, and a circuit making and breaking device also mounted on the lever cooperating with the cams on the drum whereby the lever may be actuated to associate the circuit closer with a selected cam and also close the motor circuit for driving the drum.

In testimony whereof I atlix my signature in presence of two witnesses.

CHAR-LES E. llitnesses BEN Kasrnnv, Louis SCHULT.

ALLOR Y. 

